<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript" src="js/jquery.min.js"></script>
		<script type="text/javascript" src="js/bootstrap.js"></script>
		<link rel="stylesheet" href="css/bootstrap.css" />
		<style>
			body {
				position: relative;
			}
			
			ul.nav-pills {
				top: 20px;
				position: fixed;
			}
			
			div.col-sm-9 div {
				height: 250px;
				font-size: 28px;
			}
			
			#section1 {
				color: #fff;
				background-color: #1E88E5;
			}
			
			#section2 {
				color: #fff;
				background-color: #673ab7;
			}
			
			#section3 {
				color: #fff;
				background-color: #ff9800;
			}
			
			#section41 {
				color: #fff;
				background-color: #00bcd4;
			}
			
			#section42 {
				color: #fff;
				background-color: #009688;
			}
			
			@media screen and (max-width: 810px) {
				#section1,
				#section2,
				#section3,
				#section41,
				#section42 {
					margin-left: 150px;
				}
			}
		</style>
	</head>
	<body data-spy="scroll" data-target="#myScrollspy" data-offset="20">

		<div class="container">
			<div class="row">
				<nav class="col-sm-3" id="myScrollspy">
					<div class="container-fluid">
						<div class="container-fluid">
							<ul class="nav nav-pills nav-stacked">
								<li class="active">
									<a href="#section1">Section 1</a>
								</li>
								<li>
									<a href="#section2">Section 2</a>
								</li>
								<li>
									<a href="#section3">Section 3</a>
								</li>
								<li class="dropdown">
									<a class="dropdown-toggle" data-toggle="dropdown" href="#">Section 4
										<span class="caret"></span>
									</a>
									<ul class="dropdown-menu">
										<li>
											<a href="#section41">Section 4-1</a>
										</li>
										<li>
											<a href="#section42">Section 4-2</a>
										</li>
									</ul>
								</li>
							</ul>
						</div>
					</div>
				</nav>
				<div class="col-sm-9">
					<div id="section1">
						<h1>Section 1</h1>
						<p>Try to scroll this section and look at the navigation list while scrolling!</p>
					</div>
					<div id="section2">
						<h1>Section 2</h1>
						<p>Try to scroll this section and look at the navigation list while scrolling!</p>
					</div>
					<div id="section3">
						<h1>Section 3</h1>
						<p>Try to scroll this section and look at the navigation list while scrolling!</p>
					</div>
					<div id="section41">
						<h1>Section 4-1</h1>
						<p>Try to scroll this section and look at the navigation list while scrolling!</p>
					</div>
					<div id="section42">
						<h1>Section 4-2</h1>
						<p>Try to scroll this section and look at the navigation list while scrolling!</p>
					</div>
				</div>
			</div>
		</div>

	</body>
</html>